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Potterton Promax System Boilers

Potterton Promax System Boiler prices range between £816.74 and £975.62 including VAT and excluding the cost of installation.

Potterton Promax System Boilers

Straightforward to fit, the Potterton Promax System is a fully modulating boiler that comes in a range of heating outputs such as 12kW, 15kW, 18kW, 24kW and 32kW.

As it’s a system boiler, it does require a cylinder for storing hot water but it doesn’t need to be installed alongside any other components. Measuring in at 750mm (H) x 450mm (W) x 345mm (D), this model is designed specifically for homes with high hot water demands.

Options are available for small, medium and large-sized properties, and the boiler comes with a standard 2-year warranty. The amount you will need to spend will depend on which output level is needed, with prices starting at £816.74 and going up to £975.62.

Boiler Energy Efficiency Credentials

With an efficiency rating of 89%, the Potterton Promax System is a highly efficient A-rated boiler that is compatible with the brand’s Multifit GasSaver device, which gives savings of up to 37% on gas for domestic hot water. By being a fully modulating model, it saves on usage because it can adjust itself to use the right amount of fuel to meet your requirements. This boiler is also compatible with Megaflo Eco Solar Cylinders and Santon Premier Plus Solar Cylinders to lower running costs and provide hot water in an efficient and environmentally friendly manner.

Promax System Technology and Main Advantages

The Promax System allows for greater siting flexibility because it is supplied with flueing options up to 20 metres. Your installer can actually save time when fitting this model as it comes with a pre-plumbing jig. Potterton has also developed an optional stand-off bracket so that the pipes can be kept out of sight behind the boiler.

This model has a low NOx class rating of 5 – meaning it is regarded as a ‘best in class’ boiler, and robust hydraulic connections are included to improve quality and reliability. An optional offset elbow is available as well, which allows for a boiler replacement with a central flue and without any need to drill a new hole.

Other key features include concealed user controls and a clear LED operating status display, both of which help to make this model a user-friendly appliance.

Is the Potterton Promax System the Right Boiler Type and Size for Your Home?

Perfect for properties with multiple bathrooms and households with high hot water usage habits, the Potterton Promax System is a suitable option for most small, medium and large homes. As a general rule, if you live in a small dwelling and have a lower demand for heating and hot water, you’ll be better off with one of the lower output units. However, if you have a large house and a greater demand for heat and hot water, you may require a more powerful boiler output. Always ask a Gas Safe engineer to take a look at your home before you buy a new boiler so that they can recommend the best solution based on your property and requirements.


Compare Boiler Quotes!
Potterton Promax System 12SystemH - 750 mm
W - 450 mm
D - 345 mm
N/A 12 KW£ 816.74
Potterton Promax System 15SystemH - 750 mm
W - 450 mm
D - 345 mm
N/A 15 KW£ 831.34
Potterton Promax System 18SystemH - 750 mm
W - 450 mm
D - 345 mm
N/A 18 KW£ 848.52
Potterton Promax System 24SystemH - 750 mm
W - 450 mm
D - 345 mm
N/A 24 KW£ 913.36
Potterton Promax System 32SystemH - 750 mm
W - 450 mm
D - 345 mm
N/A 32 KW£ 975.62


A-rated combi boiler Save money on your gas bill
NOx Class 5 – Best in classEnvironmentally friendly
Robust hydraulic connections Improves quality and reliability
Clear LED displayDelivers clear visibility
Concealed user controlsFamily friendly
Pre-plumbing jigSaves time and money on installation
Central flue and flueing options of up to 20 metresEase of siting and greater siting flexibility
Compatible with Potterton controlsAlternative energy and cost saving options
Compatible with Megaflo Eco Solar Cylinders and Santon Premier Plus Solar CylindersGreater fuel savings for hot water
2-year parts and labour warrantyConfidence and peace of mind

Our Honest Opinion of the Potterton Promax System

Since this system boiler is A rated for efficiency and can modulate itself down to a lower output when required, it can save you a significant amount of money on your annual fuel bills. It can also be used in conjunction with solar water heating systems for greater energy bill savings and environmental benefits.

As it comes with a pre-plumbing jig and most of the components are built into the boiler, installation is quicker and much neater. You will need a separate storage cylinder so that the boiler can provide you with hot water but the system takes up less space because you won’t need a tank in the loft.

If you want to make sure that the Promax System is as reliable at Potterton claims, we suggest you seek advice from an engineer who has plenty of recent experience in installing and servicing this model.

Advice on Boiler Quotes and Gas Safe Engineers

When obtaining Potterton Promax System Boiler quotes, we recommend you liaise with local and national installers in order to find the best deal. You should ask for a fixed price on the boiler and installation so that you aren’t faced with any hidden charges once the work is complete. It’s also crucial to check that your chosen installer/company is Gas Safe registered to confirm whether they are legally permitted to fit gas boilers. To find out the registration status of a professional or business, simply check the official Gas Safe Register online.


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